Wow. In the late 90’s I was working with rapid prototyping using laser cutting of tape-cast ceramics or suspended powder metals for baking out and sintering later. Also, stereolithography was taking off, mostly to assist in the casting industry or quickly building non-functional prototypes or proving out CAD models. I turned my attention elsewhere for years and now BAM! Look at all this neat stuff! I have a lot of catching up to do!